function textbox_focusin(userControlId){
    document.getElementById(userControlId+"_l").src="../UserControl/images/textbox2_1.png";
    document.getElementById(userControlId+"_r").src="../UserControl/images/textbox2_4.png";
    document.getElementById(userControlId+"_c").className="c_focusin";
}
function textbox_focusout(userControlId){
    document.getElementById(userControlId+"_l").src="../UserControl/images/textbox1_1.png";
    document.getElementById(userControlId+"_r").src="../UserControl/images/textbox1_4.png";
    document.getElementById(userControlId+"_c").className="c_focusout";
}
function triggerbox_focusin(userControlId,txtId,emptyText){
    textbox_focusin(userControlId);
    document.getElementById(userControlId+"_t").src="../UserControl/images/search_trigger2.png";
    var textObj=document.getElementById(txtId);
    if(textObj.value == emptyText){
        textObj.value="";
    }
    textObj.className="tbox";
}
function triggerbox_focusout(userControlId,txtId,emptyText){
    textbox_focusout(userControlId);
    document.getElementById(userControlId+"_t").src="../UserControl/images/search_trigger1.png";
    var textObj=document.getElementById(txtId);
    var text=textObj.value;
    if(text == emptyText || text == ""){
        textObj.value = emptyText;
        textObj.className="tboxEmpty";
    }
}