Validation for gif,pdf,bmb,jpeg,doc

<br /> <script type="text/javascript"> <br />//<![CDATA[ <br /> <br />function validate() <br />{ <br /> <br /> var title=document.form1.title.value; <br /> if(title==""){ <br /> alert("Please enter the Title of the Book !");document.form1.title.focus();return false; <br /> } <br /> <br /> <br />var pdf =document.form1.pdf.value; <br /> <br /> <br />if(pdf != "" ) <br /> { <br /> if (valupfile(pdf,"Only Upload PDF file!") == false) <br /> { <br /> document.form1.pdf.select(); <br /> return false; <br /> } <br /> } <br /> <br /> <br /> <br />var image =document.form1.image.value; <br /> <br /> <br /> <br />if(image != "" ) <br /> { <br /> if (valupfile1(image,"Only Upload .jpg,.gif,.png image file!") == false) <br /> { <br /> document.form1.image.select(); <br /> return false; <br /> } <br /> } <br /> <br /> <br /> <br />return true; <br />} <br /> <br /> <br />function valupfile(field,alerttxt) <br />{ <br /> with (field) <br /> { <br /> var dotpdf = field.lastIndexOf(".pdf") <br /> if(dotpdf >= 0) <br /> return true; <br /> else <br /> { <br /> alert(alerttxt) <br /> return false; <br /> } <br /> } <br />} <br /> <br /> <br />function valupfile1(field,alerttxt) <br />{ <br /> with (field) <br /> { <br /> var dotjpg = field.lastIndexOf(".jpg") <br /> var dotgif = field.lastIndexOf(".gif") <br /> var dotpng = field.lastIndexOf(".png") <br /> <br /> if(dotjpg >= 0) <br /> return true; <br /> else if(dotgif >= 0) <br /> return true; <br /> else if(dotpng >= 0) <br /> return true; <br /> else <br /> { <br /> alert(alerttxt) <br /> return false; <br /> } <br /> } <br />} <br /> <br /> //]]> <br /> <br /></script> <br />