function checkEnter(e)
{
    var keyCode;

    if(e && e.which)
    {
        e = e;
        keyCode = e.which;
    }
    else{
        e = event;
        keyCode = e.keyCode;
    }
    
    if(keyCode == 13)
        return true;
    else
        return false;
}

function startSearch(query)
{
    if(trim(query) != '')
    {
        //customPostBack('ctl00$SearchControl$SearchImageButton', '');
        __doPostBack('ctl00$SearchControl$SearchImageButton', '');
    }
    return false;
}

function trim(sString) 
{
    while (sString.substring(0,1) == ' ')
    {
        sString = sString.substring(1, sString.length);
    }
    while (sString.substring(sString.length-1, sString.length) == ' ')
    {
        sString = sString.substring(0,sString.length-1);
    }
    return sString;
}

function customPostBack(eventTarget, eventArgument)
{
    var theForm = document.forms[0];
    if (!theForm.onsubmit || (theForm.onsubmit() != false))
    {
        theForm.__EVENTTARGET.value = eventTarget;
        theForm.__EVENTARGUMENT.value = eventArgument;
        theForm.submit();
    }
}