if(document.getElementsByClassName) {

			getElementsByClass = function(classList, node) {    
				return (node || document).getElementsByClassName(classList)
			}

		} else {

			getElementsByClass = function(classList, node) {			
				var node = node || document,
				list = node.getElementsByTagName('*'), 
				length = list.length,  
				classArray = classList.split(/\s+/), 
				classes = classArray.length, 
				result = [], i,j
				for(i = 0; i < length; i++) {
					for(j = 0; j < classes; j++)  {
						if(list[i].className.search('\\b' + classArray[j] + '\\b') != -1) {
							result.push(list[i])
							break
						}
					}
				}
			
				return result
			}
		}
		
		function createHoverEvent() 
		{
			var div = document.getElementById("portfolio");
			var left = getElementsByClass("pf_field_left",div);
			for (var i=0; i<left.length; i++) 
			{
				left[i].onmouseover = function() 
				{
					this.className = "pf_field_left_hover";
				}
				left[i].onmouseout=function() 
				{
					this.className = "pf_field_left";
				}
			}
			var right = getElementsByClass("pf_field_right",div);
			for (var i=0; i<right.length; i++) 
			{
				right[i].onmouseover = function() 
				{
					this.className = "pf_field_right_hover";
				}
				right[i].onmouseout=function() 
				{
					this.className = "pf_field_right";
				}
			}
		}

		var IE6 = false /*@cc_on || @_jscript_version < 5.7 @*/;

		if (IE6)
		{
			onload = function() 
			{
				createHoverEvent();
			}
		}