var strDefaultSearchString = "Search";
var txtEmptyClass = "empty_textbox";
var txtEditClass  = "edit_textbox";

function initSearchBox(objSearchBox, txtDefault)
{
    objSearchBox.edited = false;
    objSearchBox.defaultText = txtDefault;
    objSearchBox.value = txtDefault;
    objSearchBox.onfocus = boxfocus;
    objSearchBox.onblur = boxblur;
    objSearchBox.className = txtEmptyClass;
}
function boxblur()
{
    if(this.edited) return;
    if(this.value=="")
    {
        this.className = txtEmptyClass;
        this.value = this.defaultText;
    } else this.edited = true;
    
}
function boxfocus()
{
    if(!this.edited && this.value==this.defaultText) 
    {
        this.value = "";
        this.className = txtEditClass;
    }
}