用open打開的窗體,如果該窗體已經打開,就不打開該窗體,否則就打開,怎麽判斷呢?
function openWindows()
{
var nLeft, nTop;
nLeft = (screen.width - 180);
nTop = (screen.height - 220);
var hWnd;
hWnd = window.open("WebForm2.aspx", "plist", "width=160,height=150,Top=50,Left=50,resizable=no,scrollbars=yes");
hWnd.moveTo(nLeft,nTop);
hWnd.focus();
return false;
}
function openWindows()
{
var nLeft, nTop;
nLeft = (screen.width - 180);
nTop = (screen.height - 220);
var hWnd;
hWnd = window.open("WebForm2.aspx", "plist", "width=160,height=150,Top=50,Left=50,resizable=no,scrollbars=yes");
hWnd.moveTo(nLeft,nTop);
hWnd.focus();
return false;
}
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