function SearchOnKeyDown(cntrl, button)
{
    if (cntrl.value.length > 0)
        document.getElementById(button).disabled = false;
    else
        document.getElementById(button).disabled = true;
}

function WatermarkFocus(cntrl) {
    if (cntrl.value == "Search...") 
    {
        cntrl.className = "searchBoxBlack";
        cntrl.value = '';       
    }
}

function WatermarkBlur(cntrl, button) {
    if (cntrl.value == '') 
    {        
        cntrl.className = "searchBoxGray";
        cntrl.value = "Search...";
        document.getElementById(button).disabled = true;
    }
    else
        document.getElementById(button).disabled = false;
}