Jquery连接时间值

I have time value is coming like this from the database: 00:30:00

This my code:

<script type="application/javascript">
var gdtesttime  = <?php echo $jobDetails['gd_time']; ?>;    // 00:30:00
console.log(gdtesttime);
var a = gdtesttime.split(':');
var gdseconds = (+a[0]) * 60 * 60 + (+a[1]) * 60 ;

i want to split the time in seconds and i am having this issue while saving the time in var gdtesttime how can i write in javascript.?

My Error: SyntaxError: missing ; before statement var gdtesttime = 00:30:00;

Can you pls try this : -

<script type="application/javascript">
var gdtesttime  = '<?php echo $jobDetails['gd_time']; ?>';    // 00:30:00
console.log(gdtesttime);
var a = gdtesttime.split(':');
var gdseconds = (+a[0]) * 60 * 60 + (+a[1]) * 60 ;
</script>

<script type="application/javascript">
var gdtesttime = '<?php echo $jobDetails['gd_time']; ?>';     // 00:30:00
console.log(gdtesttime);
var a = gdtesttime.split(':');
var gdseconds = (+a[0]) * 60 * 60 + (+a[1]) * 60 ;