JS suppresses the selection of text methods

IE has onselectstart this method, by setting this method can prohibit the element text is selected. Firefox does not have this method, but can be resolved through CSS or a workaround:

if (typeof (Element.onselectstart)! = "undefined") {
Forbidden elements are selected under IE
Element.onselectstart = new Function ("return false");
} else {
Workarounds for prohibited elements selected under Firefox
Element.onmousedown = new Function ("return false");
Element.onmouseup = new Function ("return true");
}

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or use Css:div {

-moz-user-select:none;

-webkit-user-select:none;

User-select:none;
}

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if (document.all)
{
obj.onselectstart= function () {return false;}; For IE
}
Else
{
obj.onmousedown= function () {return false;};

obj.onmouseup= function () {return true;};

}

Document.onselectstart = new Function (' event.returnvalue=false; ');

JS suppresses the selection of text methods