function getTo(it){

        if(it > " "){
        document.location=it;
        }
}

document.write("<form><select onChange='getTo(this[this.selectedIndex].value)'>");
document.write("<option value=' ' selected class='box'>Choose Destination</option>");
document.write("<option value='' class='box1'>Andaman</option>");
document.write("<option value='' class='box1'>Assam</option>");
document.write("<option value='' class='box1'>Arunachal Pradesh</option>");
document.write("<option value='' class='box1'>Andhra Pradesh</option>");
document.write("<option value='' class='box1'>Delhi</option>");
document.write("<option value='' class='box1'>Goa</option>");
document.write("<option value='' class='box1'>Gujarat</option>");
document.write("<option value='' class='box1'>Himachal</option>");
document.write("<option value='' class='box1'>Jammu-Kashmir</option>");
document.write("<option value='' class='box1'>Karnataka</option>");
document.write("<option value='' class='box1'>Kerala</option>");
document.write("<option value='' class='box1'>Lakshadweep</option>");
document.write("<option value='' class='box1'>Ladakh</option>");
document.write("<option value='' class='box1'>Maharashtra</option>");
document.write("<option value='' class='box1'>Manipur</option>");
document.write("<option value='' class='box1'>Mizoram</option>");
document.write("<option value=''>Madhya Pradesh</option>");
document.write("<option value='' class='box1'>Orissa</option>");
document.write("<option value='rajasthan.html' class='box1'>Rajasthan</option>");
document.write("<option value='' class='box1'>Tamil Nadu</option>");
document.write("<option value='' class='box1'>Uttar Pradesh</option>");
document.write("<option value='' class='box1'>Uttaranchal</option>");
document.write("<option value='' class='box1'>West Bengal</option>");
document.write("</select></form>");