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Js implementation: drag the alert div simulation Layer

Source: Internet
Author: User
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<Html>
<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = gb2312">
<Title> Can you drag me? </Title>
<Script language = "javascript">
<! --
Function cry (){
Alert ("can you drag me? ")
}
// -->
</Script>
<Script language = "javascript">
<! --
Window. alert = function (txt)
{
Var shield = document. createElement ("DIV ");
Shield. id = "shield ";
Shield. style. position = "absolute ";
Shield. style. left = "0px ";
Shield. style. top = "0px ";
Shield. style. width = "100% ";
Shield. style. height = "100% ";
// Shield. style. height = document. body. scrollHeight + "px ";
Shield. style. background = "#000 ";
Shield. style. textAlign = "center ";
Shield. style. zIndex = "10000 ";
Shield. style. filter = "alpha (opacity = 0 )";
Var alertFram = document. createElement ("DIV ");
AlertFram. id = "alertFram ";
AlertFram. style. position = "absolute ";
// The negative boundary Center Method, relative to the top of the shield layer

// AlertFram. style. left = "50% ";
// AlertFram. style. top = "50% ";
// AlertFram. style. marginLeft = "-125px ";
// AlertFram. style. marginTop = "-75px ";

// The negative boundary Center Method, relative to the bottom of the shield layer
AlertFram. style. right = "50% ";
AlertFram. style. bottom = "50% ";
AlertFram. style. marginRight = "-125px ";
AlertFram. style. marginBottom = "-75px ";

AlertFram. style. width = "250px ";
AlertFram. style. height = "150px ";
AlertFram. style. background = "#000 ";
AlertFram. style. textAlign = "center ";
AlertFram. style. lineHeight = "150px ";
AlertFram. style. zIndex = "10002 ";
StrHtml = "<ul style =" list-style: none; margin: 0px; padding: 0px; width: 100% "> ";
StrHtml + = "<li onmousedown =" oMove (parentNode. parentNode); "title =" "style =" cursor: move; background: # 002F9C; text-align: left; padding-left: 5px; font-size: 14px; font-weight: bold; color: # FFFFFF; height: 25px; line-height: 25px; border-left: 1px solid # FFFFFF; border-top: 1px solid # FFFFFF; border-right: 1px solid # FFFFFF; "> [prompt...] </Li> ";
StrHtml + = "<li style =" background: # 5A7EDC; text-align: center; font-size: 12px; color: # FFFFFF; height: 120px; line-height: 120px; border-left: 1px solid # FFFFFF; border-right: 1px solid # FFFFFF; ">" + txt + "</li> ";
StrHtml + = "<li style =" background: # 002F9C; text-align: center; font-weight: bold; height: 25px; line-height: 25px; border-left: 1px solid # FFFFFF; border-bottom: 1px solid # FFFFFF; border-right: 1px solid # FFFFFF; "> <input type = button value = confirm onclick =" remove () "> </li> ";
StrHtml + = "</ul> ";
AlertFram. innerHTML = strHtml;
Document. body. appendChild (alertFram );
Document. body. appendChild (shield );
Var c = 0;
This. doAlpha = function (){
If (c ++> 50) {clearInterval (ad); return 0 ;}
Shield. style. filter = "alpha (opacity =" + c + ");";
}
This. remove = function (){
AlertFram. innerHTML = "";
Shield. style. filter = "";
Shield. id = "";
Shield. style. position = "";
Shield. style. left = "";
Shield. style. top = "";
Shield. style. width = "";
Shield. style. height = "";
Shield. style. background = "";
Shield. style. textAlign = "";
Shield. style. zIndex = "";
Shield. style. filter = "";
AlertFram. id = "";
AlertFram. style. position = "";
AlertFram. style. left = "";
AlertFram. style. top = "";
AlertFram. style. marginLeft = "";
AlertFram. style. marginTop = "";
AlertFram. style. width = "";
AlertFram. style. height = "";
AlertFram. style. background = "";
AlertFram. style. textAlign = "";
AlertFram. style. lineHeight = "";
AlertFram. style. zIndex = "";
}
Var ad = setInterval ("doAlpha ()", 10 );
AlertFram. focus ();
Document. body. onselectstart = function () {return false ;};
}
Function oMove (obj ){
Var otop, oleft;
Otop = event. y-obj. offsetTop;
Oleft = event. x-obj. offsetLeft;
Obj. setCapture ();
Obj. = function ()
{
Obj. style. left = event. x-oleft;
Obj. style. top = event. y-otop;
}
Obj. = function ()
{
Obj. = null;
Obj. style. filter = null;
Obj. releaseCapture ();
}
}
// -->
</Script>
</Head>
<Body style = "margin: 0;">
<Input type = submit name = "cry" value = "Click ^_^" style = "width: 110px; height: 30px" onClick = "cry () "> </input>
</Body>
</Html>

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