Is there anyway to increase the size limit on a "mailto" function

Hi,

I have a list of contacts with emails, I want the user to be able to select the contacts they want to email and click a button to open up Outlook and populate bcc.

This is ok unless they select a lot of email addresses and the URL is too long, is there a way to get around this?

function SendEmails()
			{
				var blVals = false;
				var emailto = '';
								
				for (n = 0; n < document.frmSendMail.elements.length; n++)
					{
						if (document.frmSendMail.elements[n].name.substring(0,5) == 'Mail_')
							{
								if (document.frmSendMail.elements[n].checked)
									{
										var fieldname = 'EmailTo' + document.frmSendMail.elements[n].name.substring(document.frmSendMail.elements[n].name.indexOf('_'));
										
										var emailto = emailto + ';' + document.getElementById(fieldname).value;
										
																	
										blVals = true;										
										
									}
							}
					}
					
				if (blVals == false)
					{
						alert('Please select performers to email...');
						return false;
					}
				else
					{
						location.replace('mailto:&bcc=' + emailto);
					}
			}
			

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