<p>function clear_input(e,value) {
if( e.value==value) e.value="";
else if( e.value.length==0 ) e.value=value;
}
function delete_confirm(url)
{
    var agree=confirm("Are you sure you wish to delete?");
    if (agree) window.location=url;
    else return false ;
}
function popup(url,width,height) 
{
    newwindow=window.open(url,'name','height='+height+',width='+width+',toolbar=no,menubar=no,scrollbars=yes,resizable=no');
    if (window.focus) {newwindow.focus()}
    return false;
}
var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
function validate_form()
{
    if( document.getElementById('name') )
    {   
    var item = document.getElementById('name');
    var error1 = false;
        if( item.value.length 0) {
                    var contentElement = document.getElementById(element_id);
                    var contentHeight = contentElement.offsetHeight;
                    if (windowHeight - contentHeight &gt; 0) {
                        contentElement.style.position = 'relative';
                        contentElement.style.top = ((windowHeight / 2) - (contentHeight / 2)) + 'px';
                    }
                    else {
                        contentElement.style.position = 'static';
                    }
                }
            }
        }
        window.onload = function() {
            setContent();
        }
        window.onresize = function() {
            setContent();
        }
}</p>