function openwindow(thisvalue){
if(thisvalue !=0) {
window.open(thisvalue)
}
else 
{
alert(' Please Select Some Value')
}
}
document.write("<select name='select' class='textbox' onChange='openwindow(this.value)' size='1'>")
document.write("<option value='0' selected>Archive Section</option>")

document.write("<option value='http://www.businessmonitorpk.com/epaper//2011/march/page1.html'>Issue 11</option>")
document.write("</select>")