Deprecated function

Getting the following on Web page: “Deprecated: Function split() is deprecated in /home/independent/public_html/clickbanker.net/wp-content/plugins/clickbank-ads-clickbank-widget/clickbank-ads.php on line 312”

Here is code that contains Line 312: “
<table border=0 cellspacing=0 cellpadding=0><tr><td width=90><label for=”<?php echo $this->get_field_id(‘bordcolor’); ?>”>Border Color: </label></td><td>#<input onblur=”var e = document.getElementsByTagName(‘div’);for(var i=0; i<e.length; i+=1) {if(e[i].className && e[i].className==’cbwecb10′){e[i].style.borderColor = ‘#’+this.value;}}” onmouseover=”jscolor.bind()” class=”color” type=”text” id=”<?php echo $this->get_field_id(‘bordcolor’); ?>” name=”<?php echo $this->get_field_name(‘bordcolor’); ?>” value=”<?php echo $this->opts[‘bordcolor’]; ?>” style=”width:70px;” /></td></tr></table>
“

Web page is at “https://clickbanker.net/&#8221;

I have tried comparing this code with other code and can’t identify what is deprecated. Can someone please help? Thank you.

https://www.ads-software.com/plugins/clickbank-ads-clickbank-widget/