A simple js call problem. . . .

59433945

There is a dropdownlist,
The javascript is as follows:
  function style()
    {
        var ddl=document.getElementById("DropDownList1");
        if(ddl.options[ddl.selectedIndex].value=="style 1")
        {
            document.getElementById("Label2").innerHTML="<link href=\"stylecss/stylecss.css\" rel=\"stylesheet\" type=\"text/css\" />";
        }
        else
        {
            document.getElementById("Label2").innerHTML="<link href=\"stylecss/stylecss1.css\" rel=\"stylesheet\" type=\"text/css\" />";
        }
    }

My current cs code page pageload has been added: this.DropDownList1.Attributes.Add("onchange", "javascript:style()");
Why is there an error when selecting items? ?
How to write? ? Tell me, brothers. .

everever30

What went wrong?

59433945

When I select an item, the error "The object does not support this operation" appears.

59433945

It is the error message of the script. . . .

20025861

document.getElementById("Label2")
When sending back, the server-side control changed its ID, and there is no way to get the control with getElementById.

20025861

Take a look at the source file, label2, what is the ID after returning from DropDownList