switchImg = function( int ) {
		
		objRef = eval("pimg_l"+int);
		
		if(objRef.src.indexOf('blank') < 0){
			objBigImg.src=objRef.src;		
			fixHeight();
		}
		
	}
	
	fixHeight = function() {
	
		objBigImg = document.getElementById('big_img');
		
		intH = objBigImg.offsetHeight;

		//objBigImg.style.top = "50%";
		//objBigImg.style.marginTop = "-"+(intH/2)+"px";
		
	}
	
	function submitDownloads( objForm ) {
	
		var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	
		strName = objForm.name.value;
		strEmail = objForm.email.value;
		
		if( strName == '' || strEmail == '' ) {
			alert( 'Please fill out all required fields' );
			return false;
		}
		
		if(reg.test(strEmail) == false) {
			alert('Please supply a valid email address.');
			return false;
		}
		
		return true;
	
	}