function over(obj)
{
	var length=obj.src.length;
	var index_ext=0;
	while (obj.src.indexOf('.',index_ext+1)!=-1)
	 {
		index_ext=obj.src.indexOf('.',index_ext+1)
	 }
	var extension=obj.src.substring( index_ext , length);
	obj.src=(obj.src.substring(0,index_ext)+"_over"+extension);
}
function out(obj)
{
	var length=obj.src.length;
	var index_ext=0;
	while (obj.src.indexOf('.',index_ext+1)!=-1)
	 {
	 index_ext=obj.src.indexOf('.',index_ext+1)
	 }
	var extension=obj.src.substring( index_ext , length);
	var idx_ov=0;
	obj.src=(obj.src.substring(0,index_ext-5)+extension);
}
 function toggle_content(event, obj, default_val) {
	if (event.type=="focus") {
		if (obj.value==default_val) {
			obj.value="";
		}
	} else
	if (event.type=="blur") {
		if (obj.value=="") {
			obj.value=default_val;
		}
	}
}

function switch_img(source, id) {
	document.getElementById(id).src = source;
}
function keyUpHandler(e) {
	var evt = e || window.event;
	if (evt.keyCode == 13) {	
		document.search_form.submit();
	}
}