// ID 检查
function openoverlap() {
    var m=document.kgogo;

    if (m.id.value == "") {
        alert("请输入ID.");
        m.id.focus();
        return false;
    }

    if ((m.id.value.length < 4) || (m.id.value.length > 16)) {
        alert("请输入ID 4-15位英文字母或数字.");
        m.id.focus();
        return false;
    }
    window.open("overlap.php?form=kgogo&focus=id&muid="+m.id.value,"overlap","width=400,height=250,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no");
}

function OverImg(imageUrl)
{
	if (document.images.overimage)
		document.images.overimage.src = imageUrl;
}