function winopenCategory()
{
	var category;
	category = window.document.Form1.ddlCategory.value;
	if(category !=0)
        {
	        window.location.href = "ImageList.aspx?t=c&id=" + category;
	}
}
function winopenKeyword()
{
	var Keyword;
	Keyword = window.document.Form1.ddlKeyword.value;
	if(Keyword !=0)
        {
       	    window.location.href = "ImageList.aspx?t=k&id=" + Keyword;
	}
}
function winopenArtist()
{
	var Artist;
	Artist = window.document.Form1.ddlPhotographer.value;
	if(Artist !=0)
        {
	    window.location.href = "ImageList.aspx?t=p&id=" + Artist;
	}
}