/* prototype functions not default supported by all browsers */
if(!Array.indexOf){
	// alert("IE does not implement an indexOf function on arrays!\nWe hate IE!");
	Array.prototype.indexOf = function(v,i){
		var i = i || 0; // index to start
		if(i>this.length || i<0) return -1;
		for(;i<=this.length;i++){
			if(this[i]===v) return i;
		}
		 return -1;
	}
}

/* e-Vision namespace to make sure our functions don't collide with other library implementations */
var ENS = {};
ENS.debug = false;

/* Dollar function for easy referencing */
ENS.$;
if(!ENS.$){
	ENS.$ = function() {
		var elements = [];
		var getElement = function(element){
			if (document.getElementById) 
				return document.getElementById(element);
			if (document.all) 
				return document.all[element];
			return element;
		};
		
		var elements = new Array();
		for (var i = 0; i < arguments.length; i++) {
			var element = arguments[i];
			if (typeof element == 'string') 
				element = getElement(element);
			if (arguments.length == 1)
				return element;
			elements.push(element);
		}
		return elements;
	}
}

/* Event functions for assignment or removal of handlers for events */
if(!ENS.addEvent){
	ENS.addEvents = function (elmArray,evt,fn){
		var elArr = elmArray;
		if(typeof(elmArray)=="string") elArr = elmArray.split(",");
		if (elArr) {
            for(var i=0;i<elArr.length;i++){
                if(ENS.$(elArr[i])){
                    ENS.addEvent(ENS.$(elArr[i]),evt,fn);
                }
            }
		}
	}
	
	ENS.addEvent = function(element,evt,fn){
		var element = ENS.$(element);
		if(element){
			if(element.addEventListener){
				element.addEventListener(evt,fn,false);
			} else if (element.attachEvent){
				element.attachEvent("on"+evt,fn);
			} else {
				element["on" + evt] = fn;
			}
		}
	};
};

if(!ENS.removeEvent){
	ENS.removeEvent = function(element,evt,fn){
		var element = ENS.$(element);
		if(element){
			if(element.removeEventListener){
				element.removeEventListener(evt,fn,false);
			} else if (element.detachEvent){
				element.detachEvent("on"+evt,fn);
			} else {
				element["on" + evt] = null;
			}
		}
	};
};

if(!ENS.cancelEvent){
	ENS.cancelEvent = function(e){
		if(!e) e = window.event;
		if(!e){
			return;
		} else if(e.preventDefault){
			e.preventDefault();
		} else if(e.stopPropagation){
			e.stopPropagation();
			e.returnValue = false;
		} else if(!e.cancelBubble){
			e.cancelBubble = true;
			e.returnValue = false;
		} 
		return;
	}; 
};

if(!ENS.getTargetElement){
	ENS.getTargetElement = function(e){
		if(!e) e = window.event;
		if(!e){
			return;
		} else if(e.srcElement){
			return e.srcElement
		} else if(e.currentTarget){
			return e.currentTarget;
		}
	}
}

/* Class functions for adding removing and checking classnames for a given DOM-element */
if(!ENS.addClass){
	ENS.addClass = function (element, className) {
		var element = ENS.$(element);
		if (!ENS.hasClass(element, className)) {
			if (element.className) element.className += " " + className;
			else element.className = className;
		}
	}
}

if(!ENS.removeClass){
	ENS.removeClass = function(element, className) {
		var regexp = new RegExp("(^|\\s)" + className + "(\\s|$)");
		var element = ENS.$(element);
		element.className = element.className.replace(regexp,"$2");
	}
}

if(!ENS.hasClass){
	ENS.hasClass = function(element, className) {
		var regexp = new RegExp("(^|\\s)" + className + "(\\s|$)");
		var element = ENS.$(element);
		return regexp.test(element.className);
	}
}

if(!ENS.$C){
	ENS.$C = function(className, tagName, fromElement) {
	  var startNode = fromElement || document;
	  var tagFilter = tagName || "*";
	  var children = startNode.getElementsByTagName(tagFilter);
	  var elements = new Array();
	  
	  for (var i = 0; i < children.length; i++) {
	    var child = children[i];
	    var classNames = child.className.split(' ');
	    for (var j = 0; j < classNames.length; j++) {
	      if (classNames[j] == className) {
	        elements.push(child);
	        break;
	      }
	    }
	  }
	  return elements;
	}
}

/* Walk the DOM up to obtain a parent element reference */
if(!ENS.getParentByTagName){
	ENS.getParentByTagName = function(el,tagName){
		var element = ENS.$(el);     
		if(!element) return;
		if(element.tagName.toLowerCase()!=tagName.toLowerCase()){
			if(element.parentNode) 
				element = ENS.getParentByTagName(element.parentNode,tagName);
	    }
		return element;
	}
}

if(!ENS.getFormGroupElements){
	ENS.getFormGroupElements = function(el){
		var element = ENS.$(el);     
		var frm = ENS.getParentByTagName(element, "form");
		if(frm[element.name]){
			return frm[element.name];
		}
		return element;
	}
}

if(!ENS.isDate){
	ENS.isDate = function(y,m,d){
		var y = y || 0;
		var m = m || 0;
		var d = d || 0;
		if(d>0 && m>=1 && m<=12 && y>1900){
			if(d<=28) return true;
			if(d<=30 && m!=2) return true;
			if(d==31 && m!=2 && ((m%8)+parseInt(m/8))%2) return true;
			if(d==29 && m==2 && (y%100)%4==0) return true;
		}
		return false;
	}
}

if(!ENS.compare){
	ENS.compare = function(src, dest){
		if(src==dest) return 0;
		if(src>dest) return 1;
		if(src<dest) return -1;
	}
}

if(!ENS.LSParseFloatValue){
	ENS.LSParseFloatValue = function(value){
		return value.split(",").join(".");
	}
}
if(!ENS.LSParseDateValue){
	ENS.LSParseDateValue = function(value){
		var v = value.split("-");
		if(v.length==3){
			return v.reverse().join("-");
		}
		return "";
	}
}